/*
* ov772x Camera Driver
*
* Copyright (C) 2008 Renesas Solutions Corp.
* Kuninori Morimoto <morimoto.kuninori@renesas.com>
*
* Based on ov7670 and soc_camera_platform driver,
*
* Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
* Copyright (C) 2008 Magnus Damm
* Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/videodev2.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-common.h>
#include <media/soc_camera.h>
#include <media/ov772x.h>
/*
* register offset
*/
#define GAIN 0x00 /* AGC - Gain control gain setting */
#define BLUE 0x01 /* AWB - Blue channel gain setting */
#define RED 0x02 /* AWB - Red channel gain setting */
#define GREEN 0x03 /* AWB - Green channel gain setting */
#define COM1 0x04 /* Common control 1 */
#define BAVG 0x05 /* U/B Average Level */
#define GAVG 0x06 /* Y/Gb Average Level */
#define RAVG 0x07 /* V/R Average Level */
#define AECH 0x08 /* Exposure Value - AEC MSBs */
#define COM2 0x09 /* Common control 2 */
#define PID 0x0A /* Product ID Number MSB */
#define VER 0x0B /* Product ID Number LSB */
#define COM3 0x0C /* Common control 3 */
#define COM4 0x0D /* Common control 4 */
#define COM5 0x0E /* Common control 5 */
#define COM6 0x0F /* Common control 6 */
#define AEC 0x10 /* Exposure Value */
#define CLKRC 0x11 /* Internal clock */
#define COM7 0x12 /* Common control 7 */
#define COM8 0x13 /* Common control 8 */
#define COM9 0x14 /* Common control 9 */
#define COM10 0x15 /* Common control 10 */
#define REG16 0x16 /* Register 16 */
#define HSTART 0x17 /* Horizontal sensor size */
#define HSIZE 0x18 /* Horizontal frame (HREF column) end high 8-bit */
#define VSTART 0x19 /* Vertical frame (row) start high 8-bit */
#define VSIZE 0x1A /* Vertical sensor size */
#define PSHFT 0x1B /* Data format - pixel delay select */
#define MIDH 0x1C /* Manufacturer ID byte - high */
#define MIDL 0x1D /* Manufacturer ID byte - low */
#define LAEC 0x1F /* Fine AEC value */
#define COM11 0x20 /* Common control 11 */
#define BDBASE 0x22 /* Banding filter Minimum AEC value */
#define DBSTEP 0x23 /* Banding filter Maximum Setp */
#define AEW 0x24 /* AGC/AEC - Stable operating region (upper limit) */
#define AEB 0x25 /* AGC/AEC - Stable operating region (lower limit) */
#define VPT 0x26 /* AGC/AEC Fast mode operating region */
#define REG28 0x28 /* Register 28 */
#define HOUTSIZE 0x29 /* Horizontal data output size MSBs */
#define EXHCH 0x2A /* Dummy pixel insert MSB */
#define EXHCL 0x2B /* Dummy pixel insert LSB */
#define VOUTSIZE 0x2C /* Vertical data output size MSBs */
#define ADVFL 0x2D /* LSB of insert dummy lines in Vertical direction */
#define ADVFH 0x2E /* MSG of insert dummy lines in Vertical direction */
#define YAVE 0x2F /* Y/G Channel Average value */
#define LUMHTH 0x30 /* Histogram AEC/AGC Luminance high level threshold */
#define LUMLTH 0x31 /* Histogram AEC/AGC Luminance low level threshold */
#define HREF 0x32 /* Image start and size control */
#define DM_LNL 0x33 /* Dummy line low 8 bits */
#define DM_LNH 0x34 /* Dummy line high 8 bits */
#define ADOFF_B 0x35 /* AD offset compensation value for B channel */
#define ADOFF_R 0x36 /* AD offset compensation value for R channel */
#define ADOFF_GB 0x37 /* AD offset compensation value for Gb channel */
#define ADOFF_GR 0x38 /* AD offset compensation value for Gr channel */
#define OFF_B 0x39 /* Analog process B channel offset value */
#define OFF_R 0x3A /* Analog process R channel offset value */
#define OFF_GB 0x3B /* Analog process Gb channel offset value */
#define OFF_GR 0x3C /* Analog process Gr channel offset value */
#define COM12 0x3D /* Common control 12 */
#define COM13 0x3E /* Common control 13 */
#define COM14 0x3F /* Common control 14 */
#define COM15 0x40 /* Common control 15*/
#define COM16 0x41 /* Common control 16 */
#define TGT_B 0x42 /* BLC blue channel target value */
#define TGT_R 0x43 /* BLC red channel target value */
#define TGT_GB 0x44 /* BLC Gb channel target value */
#define TGT_GR 0x45 /* BLC Gr channel target value */
/* for ov7720 */
#define LCC0 0x46 /* Lens correction control 0 */
#define LCC1 0x47 /* Lens correction option 1 - X coordinate */
#define LCC2 0x48 /* Lens correction option 2 - Y coordinate */
#define LCC3 0x49 /* Lens correction option 3 */
#define LCC4 0x4A /* Lens correction option 4 - radius of the circular */
#define LCC5 0x4B /* Lens correction option 5 */
#define LCC6 0x4C /* Lens correction option 6 */
/* for ov7725 */
#define LC_CTR 0x46 /* Lens correction control */
#define LC_XC 0x47 /* X coordinate of lens correction center relative */
#define LC_YC 0x48 /* Y coordinate of lens correction center relative */
#define LC_COEF 0x49 /* Lens correction coefficient */
#define LC_RADI 0x4A /* Lens correction radius */
#define LC_COEFB 0x4B /* Lens B channel compensation coefficient */
#define LC_COEFR 0x4C /* Lens R channel compensation coefficient */
#define FIXGAIN 0x4D /* Analog fix gain amplifer */
#define AREF0 0x4E /* Sensor reference control */
#define AREF1 0x4F /* Sensor reference current control */
#define AREF2 0x50 /* Analog reference control */
#define AREF3 0x51 /* ADC reference control */
#define AREF4 0x52 /* ADC reference control */
#define AREF5 0x53 /* ADC reference control */
#define AREF6 0x54 /* Analog reference control */
#define AREF7 0x55 /* Analog reference control */
#define UFIX 0x60 /* U channel fixed value output */
#define VFIX 0x61 /* V channel fixed value output */
#define AWBB_BLK 0x62 /* AWB option for advanced AWB */
#define AWB_CTRL0 0x63 /* AWB control byte 0 */
#define DSP_CTRL1 0x64 /* DSP control byte 1 */
#define DSP_CTRL2 0x65 /* DSP control byte 2 */
#define DSP_CTRL3 0x66 /* DSP control byte 3 */
#define DSP_CTRL4 0x67 /* DSP control byte 4 */
#define AWB_BIAS 0x68 /* AWB BLC level clip */
#define AWB_CTRL1 0x69 /* AWB control 1 */
#define AWB_CTRL2 0x6A /* AWB control 2 */
#define AWB_CTRL3 0x6B /* AWB control 3 */
#define AWB_CTRL4 0x6C /* AWB control 4 */
#define AWB_CTRL5 0x6D /* AWB control 5 */
#define AWB_CTRL6 0x6E /* AWB control 6 */
#define AWB_CTRL7 0x6F /* AWB control 7 */
#define AWB_CTRL8 0x70 /* AWB control 8 */
#define AWB_CTRL9 0x71 /* AWB control 9 */
#define AWB_CTRL10 0x72 /* AWB control 10 */
#define AWB_CTRL11 0x73 /* AWB control 11 */
#define AWB_CTRL12 0x74 /* AWB control 12 */
#define AWB_CTRL13 0x75 /* AWB control 13 */
#define AWB_CTRL14 0x76 /* AWB control 14 */
#define AWB_CTRL15 0x77 /* AWB control 15 */
#define AWB_CTRL16 0x78 /* AWB control 16 */
#define AWB_CTRL17 0x79 /* AWB control 17 */
#define AWB_CTRL18 0x7A /* AWB control 18 */
#define AWB_CTRL19 0x7B /* AWB control 19 */
#define AWB_CTRL20 0x7C /* AWB control 20 */
#define AWB_CTRL21 0x7D /* AWB control 21 */
#define GAM1 0x7E /* Gamma Curve 1st segment input end point */
#define GAM2 0x7F /* Gamma Curve 2nd segment input end point */
#define GAM3 0x80 /* Gamma Curve 3rd segment input end point */
#define GAM4 0x81 /* Gamma Curve 4th segment input end point */
#define GAM5 0x82 /* Gamma Curve 5th segment input end point */
#define GAM6 0x83 /* Gamma Curve 6th segment input end point */
#define GAM7 0x84 /* Gamma Curve 7th segment input end point */
#define GAM8 0x85 /* Gamma Curve 8th segment input end point */
#define GAM9 0x86 /* Gamma Curve 9th segment input end point */
#define GAM10 0x87 /* Gamma Curve 10th segment input end point */
#define GAM11 0x88 /* Gamma Curve 11th segment input end point */
#define GAM12 0x89 /* Gamma Curve 12th segment input end point */
#define GAM13 0x8A /* Gamma Curve 13th segment input end point */
#define GAM14 0x8B /* Gamma Curve 14th segment input end point */
#define GAM15 0x8C /* Gamma Curve 15th segment input end point */
#define SLOP 0x8D /* Gamma curve highest segment slope */
#define DNSTH 0x8E /* De-noise threshold */
#define EDGE0 0x8F /* Edge enhancement control 0 */
#define EDGE1 0x90 /* Edge enhancement control 1 */
#define DNSOFF 0x91 /* Auto De-noise threshold control */
#define EDGE2 0x92 /* Edge enhancement strength low point control */
#define EDGE3 0x93 /* Edge enhancement strength high point control */
#define MTX1 0x94 /* Matrix coefficient 1 */
#define MTX2 0x95 /* Matrix coefficient 2 */
#define MTX3 0x96 /* Matrix coefficient 3 */
#define MTX4 0x97 /* Matrix coefficient 4 */
#define MTX5 0x98 /* Matrix coefficient 5 */
#define MTX6 0x99 /* Matrix coefficient 6 */
#define MTX_CTRL 0x9A /* Matrix control */
#define BRIGHT 0x9B /* Brightness control */
#define CNTRST 0x9C /* Contrast contrast */
#define CNTRST_CTRL 0x9D /* Contrast contrast center */
#define UVAD_J0 0x9E /* Auto UV adjust contrast 0 */
#define UVAD_J1 0x9F /* Auto UV adjust contrast 1 */
#define SCAL0 0xA0 /* Scaling control 0 */
#define SCAL1 0xA1 /* Scaling control 1 */
#define SCAL2 0xA2 /* Scaling control 2 */
#define FIFODLYM 0xA3 /* FIFO manual mode delay control */
#define FIFODLYA 0xA4 /* FIFO auto mode delay control */
#define SDE 0xA6 /* Special digital effect control */
#define USAT 0xA7 /* U component saturation control */
#define VSAT 0xA8 /* V component saturation control */
/* for ov7720 */
#define HUE0 0xA9 /* Hue control 0 */
#define HUE1 0xAA /* Hue control 1 */
/* for ov7725 */
#define HUECOS 0xA9 /* Cosine value */
#define HUESIN 0xAA /* Sine value */
#define SIGN 0xAB /* Sign bit for Hue and contrast */
#define DSPAUTO 0xAC /* DSP auto function ON/OFF control */
/*
* register detail
*/
/* COM2 */
#define SOFT_SLEEP_MODE 0x10 /* Soft sleep mode */
/* Output drive capability */
#define OCAP_1x 0x00 /* 1x */
#define OCAP_2x 0x01 /* 2x */
#define OCAP_3x 0x02 /* 3x */
#define OCAP_4x 0x03 /* 4x */
/* COM3 */
#define SWAP_MASK 0x38
#define VFIMG_ON_OFF 0x80 /* Vertical flip image ON/OFF selection */
#define HMIMG_ON_OFF 0x40 /* Horizontal mirror image ON/OFF selection */
#define SWAP_RGB 0x20 /* Swap B/R output sequence in RGB mode */
#define SWAP_YUV 0x10 /* Swap Y/UV output sequence in YUV mode */
#define SWAP_ML 0x08 /* Swap output MSB/LSB */
/* Tri-state option for output clock */
#define NOTRI_CLOCK 0x04 /* 0: Tri-state at this period */
/* 1: No tri-state at this period */
/* Tri-state option for output data */
#define NOTRI_DATA 0x02 /* 0: Tri-state at this period */
/* 1: No tri-state at this period */
#define SCOLOR_TEST 0x01 /* Sensor color bar test pattern */
/* COM4 */
/* PLL frequency control */
#define PLL_BYPASS 0x00 /* 00: Bypass PLL */
#define PLL_4x 0x40 /* 01: PLL 4x */
#define PLL_6x 0x80 /* 10: PLL 6x */
#define PLL_8x 0xc0 /* 11: PLL 8x */
/* AEC evaluate window */
#define AEC_FULL 0x00 /* 00: Full window */
#define AEC_1p2 0x10 /* 01: 1/2 window */
#define AEC_1p4 0x20 /* 10: 1/4 window */
#define AEC_2p3 0x30 /* 11: Low 2/3 window */
/* COM5 */
#define AFR_ON_OFF 0x80 /* Auto frame rate control ON/OFF selection */
#define AFR_SPPED 0x40 /* Auto frame rate control speed slection */
/* Auto frame rate max rate control */
#define AFR_NO_RATE 0x00 /* No reduction of frame rate */
#define AFR_1p2 0x10 /* Max reduction to 1/2 frame rate */
#define AFR_1p4 0x20 /* Max reduction to 1/4 frame rate */
#define AFR_1p8 0x30 /* Max reduction to 1/8 frame rate */
/* Auto frame rate active point control */
#define AF_2x 0x00 /* Add frame when AGC reaches 2x gain */
#define AF_4x 0x04 /* Add frame when AGC reaches 4x gain */
#define AF_8x 0x08 /* Add frame when AGC reaches 8x gain */
#define AF_16x 0x0c /* Add frame when AGC reaches 16x gain */
/* AEC max step control */
#define AEC_NO_LIMIT 0x01 /* 0 : AEC incease step has limit */
/* 1 : No limit to AEC increase step */
/* COM7 */
/* SCCB Register Reset */
#define SCCB_RESET 0x80 /* 0 : No change */
/* 1 : Resets all registers to default */
/* Resolution selection */
#define SLCT_MASK 0x40 /* Mask of VGA or QVGA */
#define SLCT_VGA 0x00 /* 0 : VGA */
#define SLCT_QVGA 0x40 /* 1 : QVGA */
#define ITU656_ON_OFF 0x20 /* ITU656 protocol ON/OFF selection */
/* RGB output format control */
#define FMT_GBR422 0x00 /* 00 : GBR 4:2:2 */
#define FMT_RGB565 0x04 /* 01 : RGB 565 */
#define FMT_RGB555 0x08 /* 10 : RGB 555 */
#define FMT_RGB444 0x0c /* 11 : RGB 444 */
/* Output format control */
#define OFMT_YUV 0x00 /* 00 : YUV */
#define OFMT_P_BRAW 0x01 /* 01 : Processed Bayer RAW */
#define OFMT_RGB 0x02 /* 10 : RGB */
#define OFMT_BRAW 0x03 /* 11 : Bayer RAW */
/* COM8 */
#define FAST_ALGO 0x80 /* Enable fast AGC/AEC algorithm */
/* AEC Setp size limit */
#define UNLMT_STEP 0x40 /* 0 : Step size is limited */
/* 1 : Unlimited step size */
#define BNDF_ON_OFF 0x20 /* Banding filter ON/OFF */
#define AEC_BND 0x10 /* Enable AEC below banding value */
#define AEC_ON_OFF 0x08 /* Fine AEC ON/OFF control */
#define AGC_ON 0x04 /* AGC Enable */
#define AWB_ON 0x02 /* AWB Enable */
#define AEC_ON 0x01 /* AEC Enable */
/* COM9 */
#define BASE_AECAGC 0x80 /* Histogram or average based AEC/AGC */
/* Automatic gain ceiling - maximum AGC value */
#define GAIN_2x 0x00 /* 000 : 2x */
#define GAIN_4x 0x10 /* 001 : 4x */
#define GAIN_8x 0x20 /* 010 : 8x */
#define GAIN_16x 0x30 /* 011 : 16x */
#define GAIN_32x 0x40 /* 100 : 32x */
#define GAIN_64x 0x50 /* 101 : 64x */
#define GAIN_128x 0x60 /* 110 : 128x */
#define DROP_VSYNC 0x04 /* Drop VSYNC output of corrupt frame */
#define DROP_HREF 0x02 /* Drop HREF output of corrupt frame */
/* COM11 */
#define SGLF_ON_OFF 0x02 /* Single frame ON/OFF selection */
#define SGLF_TRIG 0x01 /* Single frame transfer trigger */
/* EXHCH */
#define VSIZE_LSB 0x04 /* Vertical data output size LSB */
/* DSP_CTRL1 */
#define FIFO_ON 0x80 /* FIFO enable/disable selection */
#define UV_ON_OFF 0x40 /* UV adjust function ON/OFF selection */
#define YUV444_2_422 0x20 /* YUV444 to 422 UV channel option selection */
#define CLR_MTRX_ON_OFF 0x10 /* Color matrix ON/OFF selection */
#define INTPLT_ON_OFF 0x08 /* Interpolation ON/OFF selection */
#define GMM_ON_OFF 0x04 /* Gamma function ON/OFF selection */
#define AUTO_BLK_ON_OFF 0x02 /* Black defect auto correction ON/OFF */
#define AUTO_WHT_ON_OFF 0x01 /* White define auto correction ON/OFF */
/* DSP_CTRL3 */
#define UV_MASK 0x80 /* UV output sequence option */
#define UV_ON 0x80 /* ON */
#define UV_OFF 0x00 /* OFF */
#define CBAR_MASK 0x20 /* DSP Color bar mask */
#define CBAR_ON 0x20 /* ON */
#define CBAR_OFF 0x00 /* OFF */
/* HSTART */
#define HST_VGA 0x23
#define HST_QVGA 0x3F
/* HSIZE */
#define HSZ_VGA 0xA0
#define HSZ_QVGA 0x50
/* VSTART */
#define VST_VGA 0x07
#define VST_QVGA 0x03
/* VSIZE */
#define VSZ_VGA 0xF0
#define VSZ_QVGA 0x78
/* HOUTSIZE */
#define HOSZ_VGA 0xA0
#define HOSZ_QVGA 0x50
/* VOUTSIZE */
#define VOSZ_VGA 0xF0
#define VOSZ_QVGA 0x78
/*
* bit configure (32 bit)
* this is used in struct ov772x_color_format :: option
*/
#define OP_UV 0x00000001
#define OP_SWAP_RGB 0x00000002
/*
* ID
*/
#define OV7720 0x7720
#define OV7725 0x7721
#define VERSION(pid, ver) ((pid<<8)|(ver&0xFF))
/*
* struct
*/
struct regval_list {
unsigned char reg_num;
unsigned char value;
};
struct ov772x_color_format {
char *name;
__u32 fourcc;
const struct regval_list *regs;
unsigned int option;
};
struct ov772x_win_size {
char *name;
__u32 width;
__u32 height;
unsigned char com7_bit;
const struct regval_list *regs;
};
struct ov772x_priv {
struct ov772x_camera_info *info;
struct i2c_client *client;
struct soc_camera_device icd;
const struct ov772x_color_format *fmt;
const struct ov772x_win_size *win;
int model;
};
#define ENDMARKER { 0xff, 0xff }
/*
* register setting for color format
*/
static const struct regval_list ov772x_RGB555_regs[] = {
{ COM3, 0x00 },
{ COM7, FMT_RGB555 | OFMT_RGB },
ENDMARKER,
};
static const struct regval_list ov772x_RGB565_regs[] = {
{ COM3, 0x00 },
{ COM7, FMT_RGB565 | OFMT_RGB },
ENDMARKER,
};
static const struct regval_list ov772x_YYUV_regs[] = {
{ COM3, SWAP_YUV },
{ COM7, OFMT_YUV },
ENDMARKER,
};
static const struct regval_list ov772x_UVYY_regs[] = {
{ COM3, 0x00 },
{ COM7, OFMT_YUV },
ENDMARKER,
};
/*
* register setting for window size
*/
static const struct regval_list ov772x_qvga_regs[] = {
{ HSTART, HST_QVGA },
{ HSIZE, HSZ_QVGA },
{ VSTART, VST_QVGA },
{ VSIZE, VSZ_QVGA },
{ HOUTSIZE, HOSZ_QVGA },
{ VOUTSIZE, VOSZ_QVGA },
ENDMARKER,
};
static const struct regval_list ov772x_vga_regs[] = {
{ HSTART, HST_VGA },
{ HSIZE, HSZ_VGA },
{ VSTART, VST_VGA },
{ VSIZE, VSZ_VGA },
{ HOUTSIZE, HOSZ_VGA },
{ VOUTSIZE, VOSZ_VGA },
ENDMARKER,
};
/*
* supported format list
*/
#define SETFOURCC(type) .name = (#type), .fourcc = (V4L2_PIX_FMT_ ## type)
static const struct soc_camera_data_format ov772x_fmt_lists[] = {
{
SETFOURCC(YUYV),
.depth = 16,
.colorspace = V4L2_COLORSPACE_JPEG,
},
{
SETFOURCC(YVYU),
.depth = 16,
.colorspace = V4L2_COLORSPACE_JPEG,
},
{
SETFOURCC(UYVY),
.depth = 16,
.colorspace = V4L2_COLORSPACE_JPEG,
},
{
SETFOURCC(RGB555),
.depth = 16,
.colorspace = V4L2_COLORSPACE_SRGB,
},
{
SETFOURCC(RGB555X),
.depth = 16,
.colorspace = V4L2_COLORSPACE_SRGB,
},
{
SETFOURCC(RGB565),
.depth = 16,
.colorspace = V4L2_COLORSPACE_SRGB,
},
{
SETFOURCC(RGB565X),
.depth = 16,
.colorspace = V4L2_COLORSPACE_SRGB,
},
};
/*
* color format list
*/
#define T_YUYV 0
static const struct ov772x_color_format ov772x_cfmts[] = {
[T_YUYV] = {
SETFOURCC(YUYV),
.regs = ov772x_YYUV_regs,
},
{
SETFOURCC(YVYU),
.regs = ov772x_YYUV_regs,
.option = OP_UV,
},
{
SETFOURCC(UYVY),
.regs = ov772x_UVYY_regs,
},
{
SETFOURCC(RGB555),
.regs = ov772x_RGB555_regs,
.option = OP_SWAP_RGB,
},
{
SETFOURCC(RGB555X),
.regs = ov772x_RGB555_regs,
},
{
SETFOURCC(RGB565),
.regs = ov772x_RGB565_regs,
.option = OP_SWAP_RGB,
},
{
SETFOURCC(RGB565X),
.regs = ov772x_RGB565_regs,
},
};
/*
* window size list
*/
#define VGA_WIDTH 640
#define VGA_HEIGHT 480
#define QVGA_WIDTH 320
#define QVGA_HEIGHT 240
#define MAX_WIDTH VGA_WIDTH
#define MAX_HEIGHT VGA_HEIGHT
static const struct ov772x_win_size ov772x_win_vga = {
.name = "VGA",
.width = VGA_WIDTH,
.height = VGA_HEIGHT,
.com7_bit = SLCT_VGA,
.regs = ov772x_vga_regs,
};
static const struct ov772x_win_size ov772x_win_qvga = {
.name = "QVGA",
.width = QVGA_WIDTH,
.height = QVGA_HEIGHT,
.com7_bit = SLCT_QVGA,
.regs = ov772x_qvga_regs,
};
/*
* general function
*/
static int ov772x_write_array(struct i2c_client *client,
const struct regval_list *vals)
{
while (vals->reg_num != 0xff) {
int ret = i2c_smbus_write_byte_data(client,
vals->reg_num,
vals->value);
if (ret < 0)
return ret;
vals++;
}
return 0;
}
static int ov772x_mask_set(struct i2c_client *client,
u8 command,
u8 mask,
u8 set)
{
s32 val = i2c_smbus_read_byte_data(client, command);
val &= ~mask;
val |= set;
return i2c_smbus_write_byte_data(client, command, val);
}
static int ov772x_reset(struct i2c_client *client)
{
int ret = i2c_smbus_write_byte_data(client, COM7, SCCB_RESET);
msleep(1);
return ret;
}
/*
* soc_camera_ops function
*/
static int ov772x_init(struct soc_camera_device *icd)
{
struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd);
int ret = 0;
if (priv->info->link.power) {
ret = priv->info->link.power(&priv->client->dev, 1);
if (ret < 0)
return ret;
}
if (priv->info->link.reset)
ret = priv->info->link.reset(&priv->client->dev);
return ret;
}
static int ov772x_release(struct soc_camera_device *icd)
{
struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd);
int ret = 0;
if (priv->info->link.power)
ret = priv->info->link.power(&priv->client->dev, 0);
return ret;
}
static int ov772x_start_capture(struct soc_camera_device *icd)
{
struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd);
int ret;
if (!priv->win)
priv->win = &ov772x_win_vga;
if (!priv->fmt)
priv->fmt = &ov772x_cfmts[T_YUYV];
/*
* reset hardware
*/
ov772x_reset(priv->client);
/*
* set color format
*/
ret = ov772x_write_array(priv->client, priv->fmt->regs);
if (ret < 0)
goto start_end;
/*
* set size format
*/
ret = ov772x_write_array(priv->client, priv->win->regs);
if (ret < 0)
goto start_end;
/*
* set COM7 bit ( QVGA or VGA )
*/
ret = ov772x_mask_set(priv->client,
COM7, SLCT_MASK, priv->win->com7_bit);
if (ret < 0)
goto start_end;
/*
* set UV setting
*/
if (priv->fmt->option & OP_UV) {
ret = ov772x_mask_set(priv->client,
DSP_CTRL3, UV_MASK, UV_ON);
if (ret < 0)
goto start_end;
}
/*
* set SWAP setting
*/
if (priv->fmt->option & OP_SWAP_RGB) {
ret = ov772x_mask_set(priv->client,
COM3, SWAP_MASK, SWAP_RGB);
if (ret < 0)
goto start_end;
}
dev_dbg(&icd->dev,
"format %s, win %s\n", priv->fmt->name, priv->win->name);
start_end:
priv->fmt = NULL;
priv->win = NULL;
return ret;
}
static int ov772x_stop_capture(struct soc_camera_device *icd)
{
struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd);
ov772x_reset(priv->client);
return 0;
}
static int ov772x_set_bus_param(struct soc_camera_device *icd,
unsigned long flags)
{
return 0;
}
static unsigned long ov772x_query_bus_param(struct soc_camera_device *icd)
{
struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd);
struct soc_camera_link *icl = priv->client->dev.platform_data;
unsigned long flags = SOCAM_PCLK_SAMPLE_RISING | SOCAM_MASTER |
SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_HIGH |
priv->info->buswidth;
return soc_camera_apply_sensor_flags(icl, flags);
}
static int ov772x_get_chip_id(struct soc_camera_device *icd,
struct v4l2_dbg_chip_ident *id)
{
struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd);
id->ident = priv->model;
id->revision = 0;
return 0;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int ov772x_get_register(struct soc_camera_device *icd,
struct v4l2_dbg_register *reg)
{
struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd);
int ret;
reg->size = 1;
if (reg->reg > 0xff)
return -EINVAL;
ret = i2c_smbus_read_byte_data(priv->client, reg->reg);
if (ret < 0)
return ret;
reg->val = (__u64)ret;
return 0;
}
static int ov772x_set_register(struct soc_camera_device *icd,
struct v4l2_dbg_register *reg)
{
struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd);
if (reg->reg > 0xff ||
reg->val > 0xff)
return -EINVAL;
return i2c_smbus_write_byte_data(priv->client, reg->reg, reg->val);
}
#endif
static const struct ov772x_win_size*
ov772x_select_win(u32 width, u32 height)
{
__u32 diff;
const struct ov772x_win_size *win;
/* default is QVGA */
diff = abs(width - ov772x_win_qvga.width) +
abs(height - ov772x_win_qvga.height);
win = &ov772x_win_qvga;
/* VGA */
if (diff >
abs(width - ov772x_win_vga.width) +
abs(height - ov772x_win_vga.height))
win = &ov772x_win_vga;
return win;
}
static int ov772x_set_fmt(struct soc_camera_device *icd,
__u32 pixfmt,
struct v4l2_rect *rect)
{
struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd);
int ret = -EINVAL;
int i;
/*
* select format
*/
priv->fmt = NULL;
for (i = 0; i < ARRAY_SIZE(ov772x_cfmts); i++) {
if (pixfmt == ov772x_cfmts[i].fourcc) {
priv->fmt = ov772x_cfmts + i;
ret = 0;
break;
}
}
/*
* select win
*/
priv->win = ov772x_select_win(rect->width, rect->height);
return ret;
}
static int ov772x_try_fmt(struct soc_camera_device *icd,
struct v4l2_format *f)
{
struct v4l2_pix_format *pix = &f->fmt.pix;
const struct ov772x_win_size *win;
/*
* select suitable win
*/
win = ov772x_select_win(pix->width, pix->height);
pix->width = win->width;
pix->height = win->height;
pix->field = V4L2_FIELD_NONE;
return 0;
}
static int ov772x_video_probe(struct soc_camera_device *icd)
{
struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd);
u8 pid, ver;
const char *devname;
/*
* We must have a parent by now. And it cannot be a wrong one.
* So this entire test is completely redundant.
*/
if (!icd->dev.parent ||
to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
return -ENODEV;
/*
* ov772x only use 8 or 10 bit bus width
*/
if (SOCAM_DATAWIDTH_10 != priv->info->buswidth &&
SOCAM_DATAWIDTH_8 != priv->info->buswidth) {
dev_err(&icd->dev, "bus width error\n");
return -ENODEV;
}
icd->formats = ov772x_fmt_lists;
icd->num_formats = ARRAY_SIZE(ov772x_fmt_lists);
/*
* check and show product ID and manufacturer ID
*/
pid = i2c_smbus_read_byte_data(priv->client, PID);
ver = i2c_smbus_read_byte_data(priv->client, VER);
switch (VERSION(pid, ver)) {
case OV7720:
devname = "ov7720";
priv->model = V4L2_IDENT_OV7720;
break;
case OV7725:
devname = "ov7725";
priv->model = V4L2_IDENT_OV7725;
break;
default:
dev_err(&icd->dev,
"Product ID error %x:%x\n", pid, ver);
return -ENODEV;
}
dev_info(&icd->dev,
"%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
devname,
pid,
ver,
i2c_smbus_read_byte_data(priv->client, MIDH),
i2c_smbus_read_byte_data(priv->client, MIDL));
return soc_camera_video_start(icd);
}
static void ov772x_video_remove(struct soc_camera_device *icd)
{
soc_camera_video_stop(icd);
}
static struct soc_camera_ops ov772x_ops = {
.owner = THIS_MODULE,
.probe = ov772x_video_probe,
.remove = ov772x_video_remove,
.init = ov772x_init,
.release = ov772x_release,
.start_capture = ov772x_start_capture,
.stop_capture = ov772x_stop_capture,
.set_fmt = ov772x_set_fmt,
.try_fmt = ov772x_try_fmt,
.set_bus_param = ov772x_set_bus_param,
.query_bus_param = ov772x_query_bus_param,
.get_chip_id = ov772x_get_chip_id,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.get_register = ov772x_get_register,
.set_register = ov772x_set_register,
#endif
};
/*
* i2c_driver function
*/
static int ov772x_probe(struct i2c_client *client,
const struct i2c_device_id *did)
{
struct ov772x_priv *priv;
struct ov772x_camera_info *info;
struct soc_camera_device *icd;
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
int ret;
info = client->dev.platform_data;
if (!info)
return -EINVAL;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_err(&adapter->dev,
"I2C-Adapter doesn't support "
"I2C_FUNC_SMBUS_BYTE_DATA\n");
return -EIO;
}
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->info = info;
priv->client = client;
i2c_set_clientdata(client, priv);
icd = &priv->icd;
icd->ops = &ov772x_ops;
icd->control = &client->dev;
icd->width_max = MAX_WIDTH;
icd->height_max = MAX_HEIGHT;
icd->iface = priv->info->link.bus_id;
ret = soc_camera_device_register(icd);
if (ret) {
i2c_set_clientdata(client, NULL);
kfree(priv);
}
return ret;
}
static int ov772x_remove(struct i2c_client *client)
{
struct ov772x_priv *priv = i2c_get_clientdata(client);
soc_camera_device_unregister(&priv->icd);
i2c_set_clientdata(client, NULL);
kfree(priv);
return 0;
}
static const struct i2c_device_id ov772x_id[] = {
{ "ov772x", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ov772x_id);
static struct i2c_driver ov772x_i2c_driver = {
.driver = {
.name = "ov772x",
},
.probe = ov772x_probe,
.remove = ov772x_remove,
.id_table = ov772x_id,
};
/*
* module function
*/
static int __init ov772x_module_init(void)
{
return i2c_add_driver(&ov772x_i2c_driver);
}
static void __exit ov772x_module_exit(void)
{
i2c_del_driver(&ov772x_i2c_driver);
}
module_init(ov772x_module_init);
module_exit(ov772x_module_exit);
MODULE_DESCRIPTION("SoC Camera driver for ov772x");
MODULE_AUTHOR("Kuninori Morimoto");
MODULE_LICENSE("GPL v2");
